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판 21개, 최신 판부터
HarperCollins Publishers Limited, 2017, ISBN 9780008203917
Random House, Incorporated, 2014, ISBN 9780385375160
Random House, 2003, ISBN 9780375826801
Picture Lions, 2003, ISBN 9780007158485
Random House UK Ltd (A Division of Random House Group), 1999, Unknown Binding, ISBN 9781571351371
Tandem Library, 1999, School & Library Binding, ISBN 9780881036565
Random House Trade, 1996, 양장(하드커버), ISBN 9780676733037
Random House BFYR, 1996, 양장(하드커버), ISBN 9780679880462
HarperCollins Publishers, 1996, 양장(하드커버), ISBN 9780001713086
Random House, 1996, ISBN 9780679882817
Random House Books for Young Readers, 1995, Audio cassette, ISBN 9780676507997
HarperCollins Publishers, 1993, 양장(하드커버), ISBN 9780001718142
HarperCollins, 1993, ISBN 9780001718166
Amer School Pub, 1993, ISBN 9780087508378
Yuan liu chu ban shi ye gong si, 1992, ISBN 9789573211266
1991, ISBN 9780007661398
Random House Books for Young Readers, 1988, Audio Cassette and Book, ISBN 9780394897844
Collins & Harvill, 1964, 양장(하드커버), ISBN 9780001711167
Random House Books for Young Readers, 1963, ISBN 9780394900308
Random House Books for Young Readers, 1960, ISBN 9780394800301
Beginner, ISBN 9780583324182